1. Introduction

    1. Zero Energy Ontology

    2. The description of particles and particle interactions in the TGD framework

  2. $M^8-H$ duality

    1. About the evolution of the concept of $M^8-H$ duality

    2. Uncertainty Principle and $M^8-H$ duality

    3. Octonionic Dirac equation predicts the presence of both quarks and leptons

    4. $M^8-H$ duality and twistor lift of TGD

    5. $M^8-H$ duality at the level of WCW

    6. Some questions and ideas related to $M^8-H$ duality

  3. Zero energy ontology (ZEO)

    1. The basic view about ZEO and causal diamonds

    2. Open questions related to ZEO

    3. What happens in quantum measurement?

    4. Negentropy Maximization Principle

    5. About TGD based description of entanglement

  4. Description of particle interactions in TGD

    1. Interaction vertices

    2. How to obtain pair creation?

    3. About the geometric description of fermion pair creation vertex

    4. Exotic smooth structures make possible fermion pair creation

    5. Challenging some details of the recent view of TGD

    6. Does the universality of the holomorphy-holography principle make the notion of action un-necessary in the TGD framework?

  5. Appendix

    1. Glossary and figures

    2. Figures